package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCDemo9 {
    public static void main(String[] args) {
        try( Connection connection = DBUtil.getConnection()) {
            Scanner sc = new Scanner(System.in);
            System.out.println("登录界面启动");
            System.out.println("请输入用户名：");
            String username = sc.next();
            System.out.println("请输入密码：");
            String password = sc.next();

            String sql = "SELECT id,username,password,nickname,age "+
                    "FROM userinfo "+
                    "WHERE username =? AND password =?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1, username);
            ps.setString(2, password);
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                String nickname = rs.getString("nickname");
                System.out.println("登录成功！欢迎"+nickname+"回来");
            }
            else {
                System.out.println("用户名或密码错误！");
            }




        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
